What vascular structure is found at the deltopectoral interval?

• A. Cephalic vein
• B. Basilic vein
• C. Axillary artery
• D. Radial nerve

Answer: (A)

The deltopectoral interval is the surgical plane between the deltoid and pectoralis major, and the cephalic vein runs in this groove as a superficial vessel travelling up the arm toward the axilla. It often lies within this interval and is a familiar landmark for exposure and venous access, eventually draining into the axillary vein after piercing the clavipectoral fascia. The other vessels mentioned don’t reside in this anterior groove: the basilic vein is more medial in the arm, the axillary artery lies deeper in the axilla beneath the pectoralis minor, and the radial nerve travels in the posterior arm around the humerus, not in the deltopectoral interval.